package com.itheima.reggie.controller;


import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
import com.itheima.reggie.common.R;
import com.itheima.reggie.dto.DishDto;
import com.itheima.reggie.entity.Category;
import com.itheima.reggie.entity.Dish;
import com.itheima.reggie.entity.DishFlavor;
import com.itheima.reggie.service.CategoryService;
import com.itheima.reggie.service.DishFlavorService;
import com.itheima.reggie.service.DishService;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.web.bind.annotation.*;

import java.util.Arrays;
import java.util.List;
import java.util.concurrent.TimeUnit;
import java.util.stream.Collectors;

/**
 * 菜品管理
 */
@RestController
@RequestMapping("/dish")
@Slf4j
public class DishController {
    @Autowired
    private DishService dishService;


    @Autowired
    private DishFlavorService dishFlavorService;

    @Autowired
    private CategoryService categoryService;

    @Autowired
    private RedisTemplate redisTemplate;

    /**
     * 新增菜品
     *
     * @return
     */
    @PostMapping

    public R<String> save(@RequestBody DishDto dishDto) {
        log.info("dishDto.toString");

        dishService.saveWithFlavor(dishDto);
        //删除缓存
        String key="dish_"+dishDto.getCategoryId();
        redisTemplate.delete(key);
        return R.success("新增菜品成功");
    }

    /**
     * 菜品信息分页查询
     *
     * @param page
     * @param pageSize
     * @param name
     * @return
     */
    @GetMapping("/page")
    public R page(int page, int pageSize, String name) {
        //构建分页构造器对象
        Page<Dish> pageInfo = new Page<>(page, pageSize);
        Page<DishDto> dishDtoPage = new Page<>();
        //构建查询条件，根据名称模糊查询
        LambdaQueryWrapper<Dish> lqw = new LambdaQueryWrapper<>();
        //根据修改时间倒序排序
        lqw.like(name != null, Dish::getName, name);
        //执行分页查询
        dishService.page(pageInfo, lqw);

        //对象拷贝
        BeanUtils.copyProperties(pageInfo, dishDtoPage, "records");

        List<Dish> records = pageInfo.getRecords();

        //因为分页页面上除了要展示菜品基本信息外还要展示菜品所对应分类的名称
        List<DishDto> list = records.stream().map((item) -> {
            DishDto dishDto = new DishDto();

            //对象拷贝
            BeanUtils.copyProperties(item, dishDto);
            Long categoryId = item.getCategoryId();  //分类id
            //根据id查询分类对象
            Category category = categoryService.getById(categoryId);
            //category 报错  原因找不到数据   解决判断
            if (category != null) {
                String categoryName = category.getName();
                dishDto.setCategoryName(categoryName);
            }
            //获取分类名称
//            String categoryName = category.getName();
            //对dishDto进行赋值
//            dishDto.setCategoryName(categoryName);

            return dishDto;
        }).collect(Collectors.toList());
        dishDtoPage.setRecords(list);

        return R.success(dishDtoPage);

    }


    /**
     * 根据id查询菜品信息和对应的口味信息
     *
     * @param id
     * @return
     */
    @GetMapping("/{id}")
    public R<DishDto> get(@PathVariable Long id) {

        DishDto dishDto = dishService.getByIdWithFlavor(id);

        return R.success(dishDto);
    }


    /**
     * 修改菜品
     *
     * @return
     */
    @PutMapping
    public R<String> update(@RequestBody DishDto dishDto) {
        log.info("dishDto.toString");

        dishService.updateWithFlavor(dishDto);
        //删除缓存
        String key="dish_"+dishDto.getCategoryId();
        redisTemplate.delete(key);

        return R.success("新增菜品成功");
    }

    /**
     * 根据条件查询对应的菜品数据
     *
     * @param dish
     * @return
     */
   /* @GetMapping("/list")
    public R<List<Dish>> list(Dish dish) {
        //构造查询条件
        LambdaQueryWrapper<Dish> queryWrapper = new LambdaQueryWrapper<>();
        queryWrapper.eq(dish.getCategoryId() != null, Dish::getCategoryId, dish.getCategoryId());
        //添加条件，查询状态为1(起售状态)的菜品
        queryWrapper.eq(Dish::getStatus, 1);
        //添加排序条件
        queryWrapper.orderByAsc(Dish::getSort).orderByDesc(Dish::getUpdateTime);
        List<Dish> list = dishService.list(queryWrapper);

        return R.success(list);
    }*/

    @GetMapping("/list")
    public R<List<DishDto>> list(Dish dish) {
        //先从redis中查询
        String key="dish_"+dish.getCategoryId();
        List<DishDto> dishDtos = (List<DishDto>) redisTemplate.opsForValue().get(key);
        //如果查询到，直接返回
        if (dishDtos!= null){
            return R.success(dishDtos);
        }
        //如果查询不到，就去查询数据库，并且把数据拷贝到redis中

        //构造查询条件
        LambdaQueryWrapper<Dish> queryWrapper = new LambdaQueryWrapper<>();
        queryWrapper.eq(dish.getCategoryId() != null, Dish::getCategoryId, dish.getCategoryId());
        //添加条件，查询状态为1(起售状态)的菜品
        queryWrapper.eq(Dish::getStatus, 1);
        //添加排序条件
        queryWrapper.orderByAsc(Dish::getSort).orderByDesc(Dish::getUpdateTime);
        List<Dish> list = dishService.list(queryWrapper);

        dishDtos = list.stream().map((item) -> {
            DishDto dishDto = new DishDto();

            //对象拷贝
            BeanUtils.copyProperties(item, dishDto);
            Long categoryId = item.getCategoryId();  //分类id
            //根据id查询分类对象
            Category category = categoryService.getById(categoryId);
            //category 报错  原因找不到数据   解决判断
            if (category != null) {
                String categoryName = category.getName();
                dishDto.setCategoryName(categoryName);
            }
            //获取分类名称
//            String categoryName = category.getName();
            //对dishDto进行赋值
//            dishDto.setCategoryName(categoryName);
            //当前菜品的id
            Long dishId = item.getId();
            //根据id查询对应的口味
            LambdaQueryWrapper<DishFlavor>lambdaQueryWrapper= new LambdaQueryWrapper<>();
            //添加条件
            lambdaQueryWrapper.eq(DishFlavor::getDishId, dishId);
            List<DishFlavor> dishFlavors = dishFlavorService.list(lambdaQueryWrapper);
            dishDto.setFlavors(dishFlavors);
            return dishDto;
        }).collect(Collectors.toList());

        //将查询到的数据存入redis中
        redisTemplate.opsForValue().set(key,dishDtos,1, TimeUnit.HOURS);
        return R.success(dishDtos);
    }

    /**
     * 对菜品进行停售或者起售
     *
     * @param status
     * @param ids
     * @return
     */
//    @PostMapping("/status/{status}")
//    public R<String> status(@PathVariable("status") Integer status, Long ids) {
//        log.info("status:{}", status);
//        log.info("ids:{}", ids);
//        Dish dish = dishService.getById(ids);
//        if (dish != null) {
//            dish.setStatus(status);
//            dishService.updateById(dish);
//            return R.success("开始起售");
//        }
//        return R.error("售卖状态设置异常");
//    }


    /**
     * 批量起售或停售
     * @param status
     * @param ids
     * @return
     */
    @PostMapping("/status/{status}")
    //这个参数这里一定要加注解才能获取到参数，否则这里非常容易出问题
    public R<String> status(@PathVariable("status") Integer status, @RequestParam List<Long> ids) {

//        log.info("status:{}", status);
//        log.info("ids:{}", ids);
        LambdaQueryWrapper<Dish> queryWrapper = new LambdaQueryWrapper();
        queryWrapper.in(ids != null, Dish::getId, ids);
        //根据数据进行批量查询
        List<Dish> list = dishService.list(queryWrapper);
        for (Dish dish : list) {
            if (dish != null) {
                dish.setStatus(status);
                dishService.updateById(dish);
            }
        }
        return R.success("售卖状态修改成功");
    }

    /**
     * 套餐的批量删除和单个删除
     * @param ids
     * @return
     */
    @DeleteMapping
    public R<String>delete(@RequestParam("ids")List<Long> ids) {
        //删除菜品，这里的删除是逻辑删除
        dishService.deleteByIds(ids);
        //删除菜品对应的口味  也是逻辑删除
        LambdaQueryWrapper<DishFlavor> queryWrapper = new LambdaQueryWrapper<>();
        queryWrapper.in(DishFlavor::getDishId, ids);
        dishFlavorService.remove(queryWrapper);
        return R.success("菜品删除成功");
    }
}
